Merge origin/main: resolve conflicts in CLI surface, --prune, helpers

- Adopt origin's SnapshotPurgeOptions naming and PurgeSnapshotsWithOptions
  method, but extend with Names []string (repeatable --snapshot flag) and
  Quiet bool for use by --prune.
- Adopt origin's parseSnapshotName helper.
- Fold the duplicate post-backup prune block into one runPostBackupPrune
  call that filters retention to the snapshot names just backed up.
- Keep the shallow-verify timestamp parsing fix and the dead deep-verify
  branch removal; use origin's printVerifyHeader/verifyManifestBlobsExist
  helper extraction.
- Drop top-level vaultik purge and verify (duplicates of snapshot purge
  and snapshot verify).
- Drop the resurrected daemon block from info.go (config fields no
  longer exist).
- Combine Makefile targets: gofmt -l for fmt-check, -race for tests,
  release/release-snapshot/docker/hooks/deps/test-coverage all included.

Makefile

@@ -1,4 +1,4 @@
-.PHONY: all check test lint fmt fmt-check build clean deps test-coverage test-integration local install release release-snapshot
+.PHONY: all check test lint fmt fmt-check build clean deps test-coverage test-integration local install release release-snapshot docker hooks
 
 # Version number
 VERSION := 1.0.0-rc.1
@@ -18,20 +18,11 @@ check: lint fmt-check test
 
 # Run tests only.
 test:
-	@echo "Running tests..."
-	@if ! go test -v -timeout 10s ./... 2>&1; then \
-		echo ""; \
-		echo "TEST FAILURES DETECTED"; \
-		echo "Run 'go test -v ./internal/database' to see database test details"; \
-		exit 1; \
-	fi
+	go test -race -timeout 30s ./...
 
-# Check if code is formatted.
+# Check if code is formatted (read-only).
 fmt-check:
-	@if [ -n "$$(go fmt ./...)" ]; then \
-		echo "Error: Code is not formatted. Run 'make fmt' to fix."; \
-		exit 1; \
-	fi
+	@test -z "$$(gofmt -l .)" || (echo "Files not formatted:" && gofmt -l . && exit 1)
 
 # Format code.
 fmt:
@@ -39,7 +30,7 @@ fmt:
 
 # Run linter only.
 lint:
-	golangci-lint run
+	golangci-lint run ./...
 
 # Build binary.
 vaultik: internal/*/*.go cmd/vaultik/*.go
@@ -78,3 +69,14 @@ release:
 # Dry-run a release build without publishing or tagging.
 release-snapshot:
 	goreleaser release --clean --snapshot
+
+# Build Docker image.
+docker:
+	docker build -t vaultik .
+
+# Install pre-commit hook.
+hooks:
+	@printf '#!/bin/sh\nset -e\n' > .git/hooks/pre-commit
+	@printf 'go mod tidy\ngo fmt ./...\ngit diff --exit-code -- go.mod go.sum || { echo "go mod tidy changed files; please stage and retry"; exit 1; }\n' >> .git/hooks/pre-commit
+	@printf 'make check\n' >> .git/hooks/pre-commit
+	@chmod +x .git/hooks/pre-commit